Answer:
d. They release water vapor when they exhale.
Step-by-step explanation:
Water cycle is also known as the hydrologic cycle. water cycle is the circulation of water in the earth atmosphere system. Water cycle describes the continuous movement of water on the earth, above the earth and below the earth.
Water move through the earth-atmosphere system by different process like condensation, evaporation, transpiration, infiltration and many more process. Water evaporates to the atmosphere through surface water like oceans, lake,sea etc by process of evaporation.
Animals contributes to the process of water cycles by breathing and urination. Animals exhales more water vapor than they inhale and this contribute to the water cycle. They also contribute to the water cycle by urinating.